FR940628A - Directional microphone - Google Patents

Directional microphone

Info

Publication number
FR940628A
FR940628A FR940628DA FR940628A FR 940628 A FR940628 A FR 940628A FR 940628D A FR940628D A FR 940628DA FR 940628 A FR940628 A FR 940628A
Authority
FR
France
Prior art keywords
directional microphone
microphone
directional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of FR940628A publication Critical patent/FR940628A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR940628D 1943-06-24 1946-08-26 Directional microphone Expired FR940628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492019A US2387845A (en) 1943-06-24 1943-06-24 Electroacoustic transducer

Publications (1)

Publication Number Publication Date
FR940628A true FR940628A (en) 1948-12-17

Family

ID=23954607

Family Applications (1)

Application Number Title Priority Date Filing Date
FR940628D Expired FR940628A (en) 1943-06-24 1946-08-26 Directional microphone

Country Status (3)

Country Link
US (1) US2387845A (en)
FR (1) FR940628A (en)
GB (1) GB594646A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493819A (en) * 1947-11-25 1950-01-10 Bell Telephone Labor Inc Stabilized feed-back condenser microphone
US2587684A (en) * 1948-10-13 1952-03-04 Shure Bros Directional microphone
US2699473A (en) * 1950-11-13 1955-01-11 Rca Corp Pressure gradient responsive microphone
US2787671A (en) * 1952-10-06 1957-04-02 Schall Technik Dr Ing Karl Sch Microphone arrangement
US3061675A (en) * 1958-09-09 1962-10-30 Texas Instruments Inc Loud speaker improvement
US3057961A (en) * 1959-01-08 1962-10-09 Security First Nat Bank Self-correcting, high fidelity, sound reproducing apparatus
NL249090A (en) * 1959-03-04
US3116366A (en) * 1959-08-18 1963-12-31 Arnold L Seligson Capacitive source signal generators
DE1171960B (en) * 1961-07-08 1964-06-11 Schall Technik Dr Ing Karl Sch Condenser microphone with several selectable directional characteristics
US3207848A (en) * 1962-01-12 1965-09-21 Georg Neumann Lab Fur Elektroa Amplifying circuit for capacitive microphones
GB1148118A (en) * 1965-12-10 1969-04-10 Tesla Np Condenser microphone
GB1228775A (en) * 1967-06-06 1971-04-21
US3562429A (en) * 1968-04-29 1971-02-09 Teachout West Electro Acoustic Sound transmitter with feedback and polarization circuitry
CA866963A (en) * 1969-12-08 1971-03-23 Dayton Wright Associates Limited Audio system including electrostatic loudspeaker
DE3523104A1 (en) * 1985-06-28 1987-01-22 Leybold Heraeus Gmbh & Co Kg Arrangement having a measuring electrode to which are assigned at fixed distances a first and a second field-generating electrode
GB8704314D0 (en) * 1987-02-24 1987-04-01 Scient Generics Ltd Noise attenuation
DE102004025836B3 (en) * 2004-05-24 2005-12-22 Dr. Hielscher Gmbh Method and device for introducing ultrasound into a flowable medium
USD1000422S1 (en) * 2021-04-14 2023-10-03 Crestron Electronics, Inc. Loudspeaker grille

Also Published As

Publication number Publication date
GB594646A (en) 1947-11-17
US2387845A (en) 1945-10-30

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